Modelling and process integration of carbon dioxide capture using membrane contactors

A zero solvent emission process is proposed using a membrane device and an ionic liquid as a solvent; integrating a non-dispersive absorption-desorption process, gas compression, and transport to sequestration area analysis. The study is based on a model of a hollow fibre module formulated with a system of partial differential equations in axial and radial directions, depending of the Graetz (Gz), solvent selection (H) and Sherwood (S-h) numbers. Numerical absorption results showing carbon dioxide (CO2) recovery costs are presented, comparing them with those obtained in an integrated conventional process where Monoethanolamine (MEA) is applied as absorbent liquid.